Places where you can expand or narrow the width according to the amount of the document are very good.
Also, since the fastener is also easy to fix properly, it is likely to be able to save the document without divergence.

Although I tried and used various things in file of one year's worth of files, the file which this Sekisei's BEARING file is also durable, it is gentle to the touch and is easy to use. With this, you can keep it for 1 year.

It is used as a file of documents to be stored for a long time. You can adjust the thickness of filing and it is very convenient when you want to bind with one volume even when the amount of documents increases. I think workability is good because it is comfortable to stretch.

I think that it is attractive that the stretch file can effectively utilize the space of the document shelf. However, paper products are concerned about dirt and tear, so it seems like it would be better if there were improvements such as thick paper making a little more.